APA (7th ed.) Citation

Hollenberg, F., & Oppenheimer, O. (1910). Ex Libris Otto Oppenheimer.

Chicago Style (17th ed.) Citation

Hollenberg, Felix, and Otto Oppenheimer. Ex Libris Otto Oppenheimer. [S.l.], 1910.

MLA (9th ed.) Citation

Hollenberg, Felix, and Otto Oppenheimer. Ex Libris Otto Oppenheimer. 1910.

Warning: These citations may not always be 100% accurate.